Demon World

The Demon World (a.k.a.: Hell, Underworld, Demon Realm) is a parallel world to the Human World. It is in the Demon World where natural demons are born and also seems to serve as a source of power for the demons born there (or at least their power is reduced when they are cut off from the demon world).

The Demon world does not hold to the same natural laws that the human world does. It is generally a dark and desolate place, and incredibly dangerous.

Geography
The Demon World is a confusing place, to say the least. It seems to consist of many different planes and realms, with some, if not all, corresponding to a particular element or theme (The Fire Hell, for example).

Some parts of The Demon World even seem to be a living entity unto itself. It is not uncommon to find areas that are flesh like, pulsating, or where blood serves as water would in the human world.

Moving between worlds
It is possible to move from The Demon World to The Human World. This is done through different types of portals. It seems that while these portals require some sort of magical method to open or create (magic being exclusive to demons), they can only be opened, or are much easier to open at the least, from The Human World.

There are many different portals between the two worlds, of all different sizes. The largest of these portals having been closed by Sparda. It seems that lesser demons are much more able to travel between worlds, but it requires a much larger portal to allow more powerful demons to cross.

Rule
The Demon World is controlled by the most powerful demon. Before and during Sparda's time, this was Mundus, until he was sealed away by Sparda. After this event many demons began to vie for control. This ocoured again after Dante sealed away Mundus for a the second time. Also, while there seems to be a grand ruler like Mundus, other demons control different realms of The Demon World.